What's the difference between Western Zhou calligraphy and Spring and Autumn and Warring States calligraphy?

The calligraphy of the Western Zhou Dynasty is dominated by the model, and its form is pure. The evolution of its style takes the vertical and horizontal development of time as the main line. Calligraphy in the Spring and Autumn Period and the Warring States Period is based on spatial diversity and regional differences. Compared with the past, calligraphy in the Spring and Autumn Period and the Warring States Period is first of all different in concept. The writing and calligraphy of Yin Shang and Western Zhou Dynasties were monopolized by princes and nobles. Whether it is to communicate between heaven and man for the purpose of religion or to show glory for the purpose of inscription, the book trace contains some divinity and is calligraphy dedicated to God and ancestors. The calligraphic traces in the Spring and Autumn Period and the Warring States Period were created by scholars after they were liberated from princes and nobles, and they were handed down from person to person. Therefore, the humanization, personalization and stylization of calligraphy are revealed in this era. Therefore, aesthetic poverty and practical simplicity and convenience, that is, decorative fashion, graffiti and spontaneous writing, open the two poles of the performance space. In addition, in the diversity of technical materials, such as casting inscriptions, gold and silver misplacement, bamboo slips, silk calligraphy, stone carving and pottery printing. It is also unmatched by the previous generation.